Centistidea albantennalis Liu and Polaszek 2024, sp. n.
Year: 2024
Type: other
Abstract: Centistidea albantennalis Liu and Polaszek, sp. n. urn:lsid:zoobank.org:act: D8C7570B-608E-4DE0-8CC7-A8EFF475419E (Figure 1) Diagnosis Body length 1.5 mm, brown (Figure 1 (a)); eyes 3.7 × longer than temple, which is strongly constricted in dorsal view (Figure 1 (b)); POL:OD:OOL = 1.2:1.0:2.7; frons flat and polished; penultimate flagellomeres subquadrate; 1 st flagellomere nearly 1.2 × longer than 2 nd; flagellomeres following 4 th abruptly shortened, half the length or less of former flagellomeres; 5 th flagellomere with acute tooth ventral-apically (Figure 1 (d)); notauli distinct and crenulated in anterior half; scutellar sulcus slightly curved, uncrenulated; scutellar hind depressions large and oval, interspace 0.14 of minor axis of each depression (Figure 1 (e)); propodeum with distinct median carinae reaching beyond costulae, anterior part with rugae along the median carinae and wrinkles laterally (Figure 1 (j)); vein 1-R1 0.6 of pterostigma length; T2 3.0 × wider than median length (Figure 1 (g)); T3 longitudinally striate medially (Figure 1 (k)); ovipositor sheath half length of hind basitarsus, with long and short setae apically (Figure 1 (i)). Description Female. Body length 1.5 mm, fore wing length 1.9 mm (Figure 1 (a)). Head. 1.7 × as wide as long, 1.2 × wider than mesoscutum in dorsal view. Eyes 3.7 × longer than temple in dorsal view. Temple smooth, with dense setose punctures, strongly constricted behind eyes in dorsal view (Figure 1 (b)). Ocelli relatively large, distance between fore and hind ocellus indistinctly (1.1 ×) longer than minor axis of a hind ocellus, POL:OD:OOL = 1.0:1.0:2.3. Frons flat and polished. Vertex between eye and hind ocellus shiny and smooth with setose punctures, an indistinct dark line present joining the middle of posterior ocelli and occiput. Face (Figure 1 (c)) smooth, finely evenly punctate, densely setose, indistinctly convex medially, transverse, 1.2 × wider than high. Clypeus 2.3 × wider than medial length, sparsely setose medially. Length of malar space slightly longer than basal width of mandible. Antenna (Figure 1 (d)) indistinctly longer than body, with scape, pedicel and 1 st, 2 nd, penultimate and ultimate flagellomeres 1.5, 1.7, 5.8, 5.3, 1.1 and 1.8 × longer than wide, 1 st nearly 1.2 × longer than 2 nd, flagellomeres following 4 th abruptly shortened, half or less length of 4 th flagellomere, 5 th flagellomere with acute tooth ventro-apically. Mesosoma. Length:width:height = 1.7:1.0:1.2. Mesonotum (Figure 1 (e)) a little obscure anteriorly with fine sparse setose punctures, notauli distinct and crenulated in anterior half, absent in posterior half, indistinctly punctate along posterior margin. Scutellar sulcus slightly curved, narrow and uncrenulated. Scutellum very shiny, smooth with setose punctures as mesonotum, hind depressions large and oval, interspace 0.14 of minor axis of the depression. Propodeum (Figure 1 (j)) shiny, with distinct median carinae reaching beyond costulae, anterior part with rugae along the median carinae, and wrinkles present laterally, posterior parts polished except few short transverse rugae present, anterior part 2.5 × longer than median length of metanotum. Mesopleuron (Figure 1 (f)) highly polished, impunctate. Legs. Hind femur 3.8 × as long as its widest part. Length of hind femur:tibia:basitarsus = 1.9:3.0:1.0. Basitarsus of hind leg 0.7 as long as tarsomeres 2–5. Wings. Fore wing (Figure 1 (g)): pterostigma relatively large, 2.7 × as long as its widest part, vein 1-R1 0.6 of pterostigma length; vein r:2-SR:2-M = 1.0:5.4:2.2, 1-SR:1-M = 1.0:4.8, 1-CU1:2-CU1 = 1.0:1.8; first discal cell of fore wing 1.2 × wider than high. Hind wing (Figure 1 (h)): vein M+ CU:1-M:r-m = 2.0:2.6:1.0. Metasoma. As long as mesosoma. T1 (Figure 1 (k)) smooth, spatula-shaped, 2.2 × as long as its subapical maximum width, narrowed antero-medially. T2 3.0 × wider than median length. T3 1.7 × longer than T2, T3–T5 desclerotised, longitudinally striate medially. Hypopygium not reaching apex of metasoma. Ovipositor sheath (Figure 1 (i)) half as long as hind basitarsus, with long and short setae apically. Colour. Brown (Figure 1 (a)), except apex of abdomen and head in dorsal view darker brown. Palpi and spurs pale yellow. Antenna brown, except apical 5 flagellomeres white. Wing membranes hyaline, slightly infumate, pterostigma, veins r, 2-SR, 1-SR, 1-M and 1- CU1 darker brown, other veins light brown. Variation Specimens from Kuala Belalong Field Studies Centre and Ulu Temburong are lighter, and the propodeum has lateral carinae. Male Unknown. Host Unknown. Material examined (NHMUK) Holotype: 1♀, Malaysia, Borneo, Sabah, Maliau Plot 8 (Trap MT1), DMQI September– October 2012, No. NHMUK101639290. Paratypes: 1♀, same data as holotype except Trap MT2, No. NHMUK101639292; 2♀♀, Malaysia, Borneo, Sabah, Danum Plot 2 (Trap MT1), DMQI, September–October 2012, Nos. NHMUK101639266, NHMUK101639272; 1♀, Malaysia, Borneo, Sabah, Maliau Plot 5 (Trap MT1), DMQI, IX/ X.2012, No. NHMUK101639276; 5♀♀, Brunei (4°34'N 115°7′E), Kuala Belalong Field Studies Centre (Malaise), N Mawdsley coll., 18 May 1991. BMNH(E) 1991–173, Nos. NHMUK101639291, NHMUK101639263, NHMUK101639304, NHMUK101639271, NHMUK101639299; 1♀, Malaysia, Borneo, Sarawak, 4 th.Div.Gn.Mulu, RGS Exp., NM Collins, 23–29 October 1977, No. NHMUK101639294; 1♀, Malaysia, Borneo, Ulu Temburong N.P., Malaise trap, 14 February–9 March 1982, MC Day coll., BMNH(E)2011–106, No. NHMUK101639298. Variation Specimens from Brunei are lighter, with carinae on the anterior lateral propodeum, and ovipositor sheath longer or nearly as long as hind basitartus. Distribution MALAYSIA: (Borneo: Sabah, Sarawak); BRUNEI. Etymology The specific name ‘ albantennalis ’ derives from the Latin ‘album’ and ‘antennalis’, referring to its white apical flagellomeres. Remarks This species is similar to C. taiwanica (Papp and Chou, 1996) but differs in the following characters: vein 1-R1 present, 0.6 of pterostigma length (vein 1-R1 absent in C. taiwanica); eyes 3.7 × longer than temple in dorsal view (1.8–2.0 × in C. taiwanica); and penultimate flagellomere 1.1 × longer than wide (2.2–3.3 × in C. taiwanica).
Authors: Liu, Zhen, Polaszek, Andrew
Institutions: Natural History Museum, Hunan University of Arts and Science
Language: English
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W6911940730
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